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I am sending mails with JavaMail. My code works fine while sending small quantity of emails from our vps but when sending in loop then start throwing the following errors:
1) javax.mail.MessagingException: Could not connect to SMTP host: mail.mydomain.com, port: 25, response: -1
2) javax.mail.MessagingException: Could not connect to SMTP host: mail.mydomain.com, port: 25;
nested exception is:
java.net.ConnectException: Connection refused
Is there problem of number of connections?
My OS is centOS Enterprise Linux 5.x and lxAdmin installed with Qmail
Not sure what flavor of Qmail install you have, but you may also want to look at your tcp.smtp file and make sure you're not limiting how many addresses can be in a message if you're using the CHKUSER patch (CHKUSER_RCPTLIMIT)
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